Chemical spill in Philadelphia prompts water safety concerns and bottled water rush.

Philadelphia residents were warned to avoid drinking tap water after a chemical spill in the Delaware River, the city's main water supply. The spill from the Trinseo Altuglas chemical facility in Bristol Township caused the release of at least 8,100 gallons of a water-based latex finishing solution. The spill prompted authorities to warn residents to avoid drinking tap water, but those advisories have since been lifted. The water supply is safe to drink until at least 11:59 p.m. Monday, officials said, based on the time it takes water to move through treatment and water mains before reaching customers.